High Performance Electronic Pet Fencing System Dog Fence with Tone & Shock Pulse Stimulus Collar(for One Dog) by HKEASY This hidden fencing system is one of the most reliable and cost-efficient pet training systems in the world. A harmless radio signal will trainsmit to your dogs when they approach to the set-up boundary with the buried wire. The collar receiver which is tied around your dogs' neck will alarm a warning beep first when they approach boundary. Pulsed Proportional Stimulus--The closer your dog gets to the boundary, the more intense the shock will be.2. Progressive Tone Stimulus--A warning tone will be issued first, then a shock stimulus if your dog continues to move closer to the boundary. Audible and Visual Wire Break Indicators, should your buried wire ever break, a loud sonic alarm will sound accompanied by a flashing light. Speed Detect Anti-Run through, the faster your dog is moving, the quicker and higher level of intensity is issued. Multiple Collar Operation, add as many collars as you like to contain as many animals you have. There is no limit to the number of collars it can control. Built-in Lightning Protection, protects transmitter from power surges caused by lightning strikes. Maximum belt length up to 50cm, adjustable shock intensity fits different kinds of dogs. Variable Field width Control, allows you to precisely control the width of the signal field & Up to 5000 square meter control range (over 1.2 acre).